The good: busses are clean and drivers are friendly. They run frequently and service just about anywhere on rhe Island of Oahu. You can buy a HOLO card at any ABC store for $2.00 and put money on it. Then you can ride anywhere for $3 per ride not to exceed $7.50 per day. Over 65's can get a photo HOLO card at sattelite city hall offices and ride for $20 per month. When considering Oahu traffic, rental car prices, parking and gas, this is the way to go. You can get from Waikiki to the North Shore in 90 minutes. The drive in a car with typical traffic is about an hour. Also,you meet really nice people and get great advice on places to eat. Etc.
The Bad: sometimes the busses are late or routes confusing. But Google Maps has a "Bus" option that tells you everything you need to know and the drivers are very helpful.